Acetylene-gas burner.



Patented May 8, |900. noLAN. i E GAS BURNER.' I

mad Jan. 4,1900.)

a/w Y @IW/li .VIII

UNITED STATES PATENT OFFICE.

EDIVARI) J. DOLAN, OF PHILADELPHIA, PENNSYLVANIA.

ACETYLENE-GASpBURNER.

SPEGIFIOATICN forming part of Letters Patent No. 649,278, dated May 8, 1900.

Application led January 4, 1900. Serial No. 375. (N0 modem T0 @ZZ wtoit t may concern:

Be it known that I, EDWARD J. DOLAN, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State oli-Pennsylvania, have invented certain new and useful Improvements in Acetylene- Gas Burners; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled inthe art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in gas-burners, and especially to a burner adapted for use in burning acetylene gas or gases rich in hydrocarbon, and has pingement.v I have foundfrom experiment-l ing that a perfectly-formed and upwardlyspreading flame can be produced by making the extreme top walls of the under gas-tip considerably thicker than the sides and that the shape of the flame may be Varied at the point by flattening the top ofthe tip or slightly hollowing the same. The shape of the flame produced by my improved burner has an upwardly-spreading angle, which is the shape I prefer in this type' of burner. I find that by varying the depth of the slot in the end of theV gas-tip the shape of the flame may be varied. A deep slot-for instance, one-half the radius of the diameter of the tip-will produce a wide or highly-spread llame, whereas a slot of a less depth will cause a flame considerably longer and narrower.

Another advantage derived in the present invention, in which the walls of the tip are thicker at the top of the slot than at the sides, is that the llame is caused to become gradually hollow in the center as it is turned down, thereby preventing the flame from going together and forming a point of smoking gas.

I have found also that an u pwardly-spreading flame is a great improvement over wide or more highly spreading flaines,especially when burning acetylene gas, for the reason that it causes a stronger and more concentrated up= ward draft around the burner, thereby keepa ing it cool and feeding to the gas air of a lower temperature, it being understood that acetylene gas gives the best illuminating results when the burner is kept cool and also the supply of' air mixing with it.

My invention is clearly illustrated in the accompanying drawings, which, with the letters of reference marked thereon, form a part of this application, and in which* Figure l is a central longitudinal sectional view through the burner in the line of the slot. Fig. 2 is a central longitudinal View through the burner at right angles to the slot in the tip. Fig. 3 is a top plan View of the burner and tip. Fig. 4 is a kdetail view showing a wide-spreading flame caused by a deep slot; and Fig. 5 is a narrower and upwardlydisposed llame, caused by having a shallower slot in the tip.

Reference now being had to the details of the drawings by letter, Adesignates the body por-n tion of the burner, havingatapering tip which is slotted at A. The inner wall of the bore of the burner tapers from the points B inward and upward to the points C C, and thence the bore in a contracted form continues toward the tip of the burner and terminates in a curved wall D, through which wall the slot A' leads, as shown in the drawings. It will be noted that the walls of the slot A' are thicker above the curved end of the bore than atthe sides at E, thus allowing a less frictional resistance to the gas which passes out of the slot at the sides than through the slot directly above, thus equalizing the pressure at all parts of the slot. By extending, the

bore of the burner well up into the tapering tip' and making the slot A in the tip so that its lower end will be through the thinnest portion of the wall of the burner-tipa flame with an upwardly-spreading angle is produced, as illustrated in Fig. 5 of the drawings. This is the preferable shape of the flame, which is perfectly formed without broken parts or tails, this being produced by having the sides of the slot, as illustrated, thinner than the top wall, in about the proportion of one to five, whereby the gas may rush out at the sides with greater force than it does directly above, where its passage is impeded by its frictional contact with the opposite surfaces of the thicker portions of the walls of the tip. In producing the shape of iiame doscribed by means of myimproved burner the burner is kept comparatively cool, and the air being fed to the flame is prevented from becoming heated, both of which are desideratunis in producing a satisfactory acetylene iiame.

Seated over the tip is my improved Hameseating portion K, which may be secured in anysuitable manner to the burner. This seating portion has its sides cut away, as seen at K', Fig. 2, and has a slot N, which is in alinement with the slot A in the gas-burner. By the use of this flame-seating portion the air from the outside is allowed to come in contact with the gas as the latter issues from the slotted tip of the burner.

While I have shown a particular shape of gas-tip in the drawings, I do not conine my invention to any shape, as it is evident that various modifications may be made without departing from the spirit of the inventionas, for instance, the top of the tip may be rounded, if desired, instead of Ilattened, as;

shown in the drawings.

Having thus described my invention,what1 l. A burner-tip for burning acetylene and other gases rich in hydrocarbon, havinga cylindrical and dome-shaped bore therein, the upper portion of the tip tapering and having a slot extending through into the dome of said bore, the Walls of the slot being thickest at the top of the tip and thinnest at the lower margin of the slot.

:2. A burner-tip for burning acetylene and other gases rich in hydrocarbon, having a cylindrical and dome-shaped bore therein, the upper portion of the tip tapering and having a slot extending through into the dome of said bore, the walls of the slot being thickest at the top of the tip, and thinnest at the lower margin of the'slot, the thickness of the slotted wall graduallyincreasing from the lower margin of the slot, to the highest part of the dome, as set forth.

3. A tip for burning acetylene and other gases, having a tapering tip which is slotted at its extreme upper end, the walls of the slot being thinnest at its lower margin, and graduallyincreasing in thickness toward the end of the tip, combined with a skeleton flame-seating portion having a slot registering with the slot in said tip, as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

EDWARD J. DOLAN Witnesses:

ARTHUR F.. Nirrzsonn, EDWARD C. Niximinrs. 

